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authorTejun Heo <tj@kernel.org>2014-02-13 06:58:41 -0500
committerTejun Heo <tj@kernel.org>2014-02-13 06:58:41 -0500
commit924f0d9a2078f49ff331bb43196ec5afadc16b8f (patch)
tree6df0c9852c7b16c2f2eb69b04f90aacae9f95132 /block
parentcb0f1fe9ba47c202a98a9d41ad5c12c0ac7732e9 (diff)
downloadlinux-924f0d9a2078f49ff331bb43196ec5afadc16b8f.tar.gz
linux-924f0d9a2078f49ff331bb43196ec5afadc16b8f.tar.xz
cgroup: drop @skip_css from cgroup_taskset_for_each()
If !NULL, @skip_css makes cgroup_taskset_for_each() skip the matching css. The intention of the interface is to make it easy to skip css's (cgroup_subsys_states) which already match the migration target; however, this is entirely unnecessary as migration taskset doesn't include tasks which are already in the target cgroup. Drop @skip_css from cgroup_taskset_for_each(). Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Li Zefan <lizefan@huawei.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: Daniel Borkmann <dborkman@redhat.com>
Diffstat (limited to 'block')
-rw-r--r--block/blk-cgroup.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 1cef07c..4aefd46 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -894,7 +894,7 @@ static int blkcg_can_attach(struct cgroup_subsys_state *css,
int ret = 0;
/* task_lock() is needed to avoid races with exit_io_context() */
- cgroup_taskset_for_each(task, css, tset) {
+ cgroup_taskset_for_each(task, tset) {
task_lock(task);
ioc = task->io_context;
if (ioc && atomic_read(&ioc->nr_tasks) > 1)